About a year ago, I bought a set of plastic door card /panel removal tools on EBay (because they were cheap) and stored them in a cabinet in case I ever needed them.
Well it just so happened that the tapered ones with cranked ends proved to be ideal for removing, cleaning out the grooves and re-installing my R10 brake caliper seals and dust covers, without scratching the metal surfaces, so now they have more than paid for the purchase price (about $4) .